Surgeon s operating chair



(No Model.) 4 Sheets-Sheet 1. R. B. ROBERTS, W. D. ALLISON 8a O. N. LEONARD.

n SURGEONS OPERATING CHAIR.

W'1526885.51' T/5% ggf afn] cib/f Bv l y Qml.

A TOR/VE Y (No Model.) 4 Sheets-Sheet 2. R. B. ROBERTS, W. D. ALLISON 8v O. N. LEONARD.

SURGEONS OPERATING'GHAIR.

Patented May 19 A TTOHNEY Y mums rzfsns co.. Pnovoamvo., msmncwon, n. c.

(No Model.) 4 Sheets-Sheet 3.

RQB. ROBERTS, W. D.,ALLISON 8u G. N. LEONARD. SURGBONS OPERATING CHAIR.

No. 452,389. Patented May 19,1891.

ATTORNEY (No Model.) 4 Sheets-Sheet 4.

R. B. ROBERTS,l W. D. ALLISON & O. N. LEONARD. SURGEONS QPERATING CHAIR.

No. 452,389. Patented May 19, 1891.

A TTOH/VEY UNITED STATES PATENT OEEicE.

RICHARD B. ROBERTS, VILLIAM D. ALLISON, AND CHARLES N. LEONARD, 0F

INDIANAPOLIS, INDIANA; SAID LEONARD ASSIGNOR TO SAID ROBERTS AND ALLISON.

`SURGEONS OPERATING-CHAIR.

SPECIFICATION forming part of Letters Patent No. 452,389, dated May 19, 1891. Application iiled March 27. 1890. Serial No. 345.470. (No model.)

To @ZZ whom it may concern: to rest upon the front beam of frame A, and

Be it known that we, RICHARD B. ROBERTS, thus prevent the tilting frame from tilting VILLIAM D ALLISON, and CHARLES N. LEON- forward. Beam D of the tilting frame is ta- ARD, citizens of the United States, residing at pered on the upper side each way from beam 5 Indianapolis, in the county of Marion and O, as clearly shown in Fig. LEso as to permit 55 State of Indiana, have invented a new and a limited sidewise tilting of the seat E. The useful Improvement in Surgeons Operatingseat E is a dat box-like structure, which is Chairs, of which the following is a specificamounted on the beam C of the tilting frame OIL by means of hinges 1T t' z', secured to the upper IO Our invention relates to certain new and edge of"the beam and the under side of the 6o useful improvements in surgeons operatingseat along the center, so as to permit the seat chairs, whereby the position of the patient to tilt sidewise, as shown in full and dotted may be more perfectly adjusted and conlines in Fig. 4. trolled; and the objects of ourimprovements For the purpose of adjustably controlling I 5 are,iirst, to provideimproved means for tilting the backward tilting of the seat we pivot to 65 the seat of the chair both backward and sidethe front end of beam O a serrated segmentwise and for securing it in position, and, secbar F, which engages a similarlyserrated 0nd, to provide improved means for adjusting block G, rigidly secured to the baseframe. and securing the back relatively to the seat. Bar F is held normally in engagement with 2O The accompanying drawings illustrate our block G by the following means: A shaft H 7o invention. Y extends back of the segment-bar across the Figure 1 represents a side elevation showbase-frame, and is mounted at its ends so as ing the chair in its normal position. Fig. 2 to turn in the frame. An arm I is secured represents a central longitudinal section, as to shaft H near one end, and a cam J is se- 2 5 at a, Figs. 4 and 5, showing the seat in its cured to the shaft in the center opposite bar 75 normal position and the back and leg-rest eX- F. A rod K, having an enlarged head j, is tended. Fig. 3 represents the same section connected at one end to arm I, and passes as Fig. 2, showing the seat tilted backward. backward from thence through the cross- Fig. l represents a transverse section at b, vbeam B of the base-frame. A spiral spring 30 Fig. 2, looking toward the back, and showing L is mounted on rod K between the head j 8o the seat tilted sidewise. Fig. 5 represents and beam B in such a manner as to force cam the same section looking toward the front and J constantly against the segment-bar F. Rod showing the seat level. Fig. G represents a K is connected to a bell-crank lever M, pivplan of the base-frame on which 'the seat is oted to the base-frame, and this is connected 3 5 mounted. Fig. 7 represents, on an enlarged by a rod N with a foot-lever O, and shaft H 85 scale, a longitudinal section of one of the is turned and camJ thus withdrawn from bar arms of the chair, showing part of the mech- F by the depression of lever O.

anism for adjusting and supporting the back. The back P is pivoted at its lower end to Fig. 8 represents a transverse section of the the seat so as to swing in a vertical plane 4o arm at g, Fig. 7. Fig. 9 represents, on an enthereon. 9o

larged scale, a detail showing the means for The arms Q Q are each mounted on a castcontrolling the sidewise tilting of the seat. ing R, which is pivoted at one end to the back In the drawings,A is the base-frame format r and is hinged at the front end to the ing the support on which the other parts are upper end of a short standard S, which is 45 mounted. To the upper side of a central pivoted at the lower end to the seat. For the 95 cross-beam B of the frame A a tilting frame purpose of holding the back adjustably in consisting two beams C and D, crossing each 'position relative to the seat within certain other at a right angle, is hinged so as to lie limits we pivot to the upper sides of each of level or tilt backward upon the base-frame. the castings R, near the front end, a ratchet- 5o One end of beam C is notched, as at 71., so as toothed rack-bar T, which extends backward 10o along the casting within the arm and engages a pawl U, which is pivoted to the back at s and projects its free end through a slot t in the casting R.

5 For the purpose of enabling the operator to raise the rack-bars T in both arms simultaneously and at the same time hold the back and control its adjustment, each rack-bar is provided with a lug fu., which extends from a point opposite the pivot which connects the rack -bar with the casting R downward through the slot. t. A shaft V extends across the back of the chair and through the casting R on each side, thus forming the pivot on which the casting turns, and projects through on each edge of the back far enough to receive on cach end a bell-crank lever lV, which is rigidly secured tothe shaft. 'lhe short arms of the levers W are con nccted with the lugs u of the respective rack-bars by a connecting-rod, as at c, the whole arrangement being such that the operator holding the back with one hand may raise the lever \V on either side of the chair, and thus raise the rack-bars T in both arms simultaneously.

It is desirable at times to swing the back down parallel or nearly parallel with the seat, and in such a position the rack-bars 'l and pawls U cease to be operative to sustain and properly support the back, and we therefore support the back in its extended position by means of a slotted arm X, which is secured to the back edge of the seat and extends downward and backward therefrom, and is further supported and secured by a forked brace Z, secured to the seat and to the lower end of the arm. A bail 1 is pivoted at its ends to opposite edges of the back, as at 2, and the bight of the'bail slides in the slot of arm X and rests in a notch 3 or at the bottom of the slot, as shown in Fig. 2.

It is desirable at times to tilt the seat and the extended back backward, as shown in Fig. 3, and it is desirable that when in this position the back should be rigidly locked in position relatively to the seat, so that by lifting on the back, the back and seat may move as one. For this purpose we format the lower end of the slot in arm X, an outwardly-extended notch 1L,into which the bight of the bail 1 falls and locks the back in position.

Vhen the seat is in its normal position, as shown in Fig. 2, it is desirable to prevent the bight ot the bail from falling into notch t, so that the back may be tilted independently of the seat. For this purpose we secure to the base-frame a guard 5, having at the top a transverse bar G, of such length that it will engage the divergent arms of the bail near its bight, as in Fig. 2, but will pass between said arms at a point farther from the bight, asin Fig. 3. Pivoted to the front edge of the seat is the leg-rest 7, having at its free end a short hinged section 8, which may be extended so as to form a parallel continuation of the leg-rest, as shown in Fig. 3, or be step for supported at a right angle thereto to torni a mounting the chair, as shown in Fig. l, by means of a pair of swinging links, like t), arranged one on each side, which are pivoted at one end to the body of the rest and engage a catch 10 on the step. The leg-rest is supported at ditterent angles relatively to thc seat by means ot a pair et brace-rods 11 11, which are pivoted at one end to the seat and engage with their free ends two series of stops 12 12, secured to the under side of the leg-rest. For the purpose of operating the tree ends of rods 11 simultaneously they are connected by a shaft 13, having a bearing in each rod, and having secured thereto at each end, so as to turn with the rod, trip-levers 14, and provided also with apairof groovedeollars 15. Rods 11 are held normally against the under side ot' the leg-rest and in engagement with the stops 12 by wire springs 1G 16, which rest in the grooved collars 15 and are secured at each end to the rest. Shaft 13 is turned b v means of a handle 17, so that one end ot the tri p-levers 1l strikes the under side of the leg-rest and forces the shaft and both of the rods 11 downward, thus disengaging them simultaneously from the stops.

The seat is held in position sidewise, either when level or when tilted, by means of the device illustrated in Figs. -1 and 9. A bent bar 1S is pivoted at one end to the crosstim ber D of the tilting frame on which the seat is mounted. Bar 1S is bent to form an arc of a circle substantially concentric with the hinges t, which connect the seat to the tilting frame, and it passes through an eyebolt 19, mounted on the frame of the seat and carrying a hand-nut 2O on the outer projecting end. lVhen the bar 1S is released, the seat and the back and leg-rest, which are conneeted to the seat, may be tilted to either side and secured in position by turning the hand-nut so as to clamp the bar against the inside of the seat-frame.

In treating rectal diseases it is necessary to have the several instruments used readily at hand, and for this purpose we provide in the middle of the front edge of the scat a sliding shelf 21, which may be drawn out when the leg-rest is lowered, as in Fig. 1, or may be slid into the seat out of the way to permit the raising of the leg-rest, asinFig. 2.

The operation et the several parts is obvious from the above detailed description.

le are aware that a somewhat similar mechanism for controlling the relation of the back to the seat and to the arms is shown in United States Letters Patent No. 203,539,5,and we do not claim anything therein shown; but our device diiters from that in using a continuous casting forming a pivoted and hinged support on which the arm is mounted, and in the means provided for raising the rack-bars simultaneously.

lVe claim as our invention-M 1. In a chair, the combination, with the seat, the back pivoted thereto near its edge, the

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pair of standards pivoted to the seat near its front edge, the pair of ar1n-castings, each pivoted at one end to the back and hinged at the other end to one of said standards, the pair of rack-bars pivoted to the arm-castings and each having a downwardly-projecting lug at its pivoted end, the pair of pawls, each pivoted at one end to the back and arranged to engage a rack-bar with the other end, the shaft passing through the back of the chair from edge to edge and forming a pivotal support for both of the ar1n-castings, the pair of bell-crank levers secured to the opposite ends of said shaft, andthe pair of connecting-rods connecting said bell-crank levers and rackbars, whereby the chair-back is adjustably secured relatively to the seat and the rackbars are simultaneously lifted, as set forth.

2. In a chair, the combination of the baseframe, the seat hinged to the base-frame so as to tilt thereon, the slotted arm rigidly secured to the seat projecting downward therefrom and provided Awith notch 4, the back pivoted to the seat and arranged to swing in a vertical plane thereon, the bail pivoted at its ends to the back and arranged to engage the notch in the arm, and the guard secured to the base-frame and arranged to project into the path of the bail, whereby the bail is prevented from entering the notch when the seat is in its normal position, all substantially as and for the purpose set forth.

3. In a chair, the combination of the baseframe having the cross-beam B, the tilting frame consisting of beams C D, constructed and arranged as described, the hinges connecting beam B and said tilting frame, means, substantially as shown and described, for adjustably holding said tilting frame in position on the base-frame, seat E, hinges 'L' i, connecting said seat and the top of beam C of the tilting frame, the bent bar 18, pivoted to the tilting frame, eyebolt 19, and hand-nut 20, mounted on the seat and arranged to engage said bent bar, all arranged to co-operate substantially as specified, whereby the seat is tilted and adjustably secured at dilferent angles, as set forth.

RICHARD B. ROBERTS. WILLIAM D. ALLISON. CHAS. N. LEONARD. Witnesses:

H. P. Hoon, V. M. Hoon. 

